搜索结果: 1-5 共查到“矿床学与矿相学 Precambrian”相关记录5条 . 查询时间(0.109 秒)
Multiple Episodes of Clay Alteration at the Precambrian/Paleozoic Unconformity, Appalachian Basin: Isotopic Evidence for Long-Distance and Local Fluid Migrations
Alteration Brines Chlorite Illite Isotopes Meteoric Water Precambrian Unconformity Ontario
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2011/12/6
Abstract: Chlorite and illite are commonly associated with ubiquitous secondary K-rich feldspar in the rocks located immediately above and below the Precambrian-Paleozoic unconformity in southwestern ...
“Retrograde Diagenesis” of Clay Minerals in the Precambrian Freda Sandstone, Wisconsin
Analytical Electron Microscopy Chlorite Freda Formation Illite I-S Muscovite Retrograde Diagenesis Scanning Electron Microscopy Smectite Transmission Electron Microscopy
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2011/12/6
Abstract: Siltstones from the Precambrian Freda Formation in Wisconsin have been studied by scanning, scanning-transmission and analytical electron microscopy (SEM, STEM and AEM), and X-ray diffractio...
Hematite and Goethite from Duricrusts Developed by Lateritic Chemical Weathering of Precambrian Banded Iron Formations, Minas Gerais, Brazil
Hematite Goethite Laterite Mossbauer Spectrometry
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2011/12/1
Abstract: The upper 15–20 m of a 200 m thick lateritic weathering profile on Precambrian itabirites of Capanema, Brazil, reveals a genetic pathway for the formation of hematitic and goethitic nodules ...
Preservation of Clay Minerals in the Precambrian (1.1 Ga) Nonesuch Formation in the Vicinity of the White Pine Copper Mine, Michigan
Chlorite Diagenesis Illite Mixed-layer illite/smectite Nonesuch Formation White mica
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2011/12/28
The Middle Proterozoic (1.1 Ga) Nonesuch Formation, host of the stratiform copper deposit at White Pine, Michigan, consists of 200 m of principally dark grey clastic sediments which contain detritus o...
Scanning Electron Microscopy of Quartz in Precambrian Cherts and Dolomites from Southern Africa
Chert Crystallization Dolomite Morphology Metamorphism Quartz
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2012/2/10
Scanning electron microscopic (SEM) examination of the quartz isolated from chert of Transvaal and Swaziland, of 2000 and 3400 million year (MY) ages, respectively, in southern Africa revealed marked ...